JP4341539B2 - Receiving apparatus and receiving antenna setting method - Google Patents

Description

  The present invention relates to a broadcast receiving apparatus and a receiving antenna direction setting method, and more particularly to a receiving apparatus and a receiving antenna direction setting method capable of simultaneously receiving a plurality of channels.

  There may be a plurality of broadcasting radio wave transmission stations and relay stations in terrestrial broadcasting for one reception area. For example, Japanese Patent Application Laid-Open No. 2001-86019 discloses a technique for storing optimal reception antenna settings for each selected channel and performing the settings at the time of channel selection.

JP 2001-86019 A

  However, in the broadcast receiving apparatus and the receiving antenna setting method described above, it is assumed that there is only one tuner unit for one receiving antenna, and a plurality of tuner units are provided for one receiving antenna. No consideration is given to the case of a broadcast receiving apparatus including a plurality of signal processing units. In other words, it is mentioned that if the receiving antenna is controlled so that the reception state of the channel selected by one tuner is suitable, the reception state of the channel selected by the other tuner is not necessarily favorable. Not. For this reason, even if the reception state of one tuner is good, the reception state deteriorates in other tuners, and a case where a good video signal / audio signal / data cannot be obtained may occur.

  The present invention has been devised in view of the above-described problems, and its purpose is to receive and receive a receiving device that realizes a suitable receiving state when a plurality of tuners select different channels. It is to provide an antenna setting method.

  In order to achieve the above object, for example, as described in claim 1, an antenna that receives a broadcast signal having an audio signal and / or a video signal, an antenna control unit that controls the antenna, and the antenna received by the antenna First and second receiving units for selecting, demodulating and decoding a desired channel from the broadcast signal, and signal quality for obtaining information on the quality of the signal selected by the first and second receiving units An information acquisition unit, and an antenna setting information storage unit that stores information related to the setting of the antenna based on information related to the quality of the signal acquired by the signal quality information acquisition unit, and the antenna control unit includes the antenna setting What is necessary is just to comprise so that the direction of a receiving antenna may be controlled using the information regarding the setting of this antenna memorize | stored by the information storage part.

  According to the present invention, it is possible to provide a reception device reception and reception antenna setting method in which each tuner realizes a suitable reception state when a plurality of tuners select different channels.

  Hereinafter, embodiments will be described in detail.

  Hereinafter, the first embodiment will be described. FIG. 7 is a diagram showing an overview of the present embodiment. A broadcast receiving apparatus 705 having a receiving antenna 704 receives broadcast signals from transmitting stations 701, 702, and 703 having different directions and distances. In order to obtain a good video signal, audio signal, data, etc., the broadcast receiving apparatus 705 adjusts the direction of the receiving antenna having directivity and the amplification factor.

  This will be described in detail below. FIG. 1 is a block diagram illustrating a configuration example of a broadcast receiving apparatus according to the present embodiment. In FIG. 1, the receiving antenna 100 includes a directivity changing unit whose receiving sensitivity changes depending on the direction of the element. Further, the receiving antenna 100 may include an amplifying unit that can change the amplification factor and a polarity inverting unit that can invert the polarity of the received signal. The settings of these receiving antennas are controlled by the antenna control unit 115. Further, the processing in the tuners 104 and 105, the signal processing units 106 and 107, the signal synthesis units 108 and 109, and the antenna control unit 115 are controlled by the control unit 113. Broadcast radio waves received by the receiving antenna 100 are distributed by the distribution unit 101 and supplied to the tuner 104 and the tuner 105, respectively.

  In the first reception unit 102, the tuner 104 performs a channel selection process for selecting a signal of a desired channel from the supplied reception signal, and supplies the channel processing to the signal processing unit 106. The signal processing unit 106 performs demodulation and signal processing on the supplied reception signal according to the broadcasting system, and supplies data such as a video signal, an audio signal, and program related information to the signal synthesis unit 110. Signal processing here is, for example, decoding processing or the like.

  Further, the signal processing unit 106 includes a detection unit 108 that detects information related to the signal quality of the received signal (hereinafter referred to as “signal quality information”), and notifies the control unit 113 of the signal quality information of the received signal. . If the received signal is a digital broadcast, this signal quality information assumes the received signal noise ratio (SNR (Signal to Noise Ratio)) in the demodulation process, the bit error rate in the error correction process, the AGC control voltage, etc. On the other hand, when the reception signal is analog broadcasting, the reception SNR of the video signal and the AGC control voltage are assumed. The signal quality information in the present embodiment is not limited to these.

  The second receiving unit 103 performs the same operation as that of the first receiving unit 102. That is, the tuner 105 performs channel selection processing and supplies it to the signal processing unit 107. The signal processing unit 107 performs demodulation and signal processing, and supplies data such as a video signal, an audio signal, and program-related information to the signal synthesis unit 110. The detection unit 109 notifies the control unit 113 of the signal quality information of the received signal.

  The control unit 113 stores the setting for the tuner 104, the setting for the antenna control unit 115, and the signal quality information supplied from the detection unit 108 in the storage unit 114 in association with each other. In addition, the control unit 113 performs control so that the setting for the tuner 105, the setting for the antenna control unit 115, and the signal quality information supplied from the detection unit 109 are stored in the storage unit 114 in association with each other.

  The signal synthesis unit 110 selects at least one video signal and program information data from the video signal, audio signal, and program information related information supplied from the signal processing unit 106 and the signal processing unit 107. The video signal is combined with an arbitrary video signal and output to the video display device 111, and at least one audio signal is selected and supplied to the audio output device 112.

  In the broadcast receiving apparatus according to the present embodiment, the receiving antenna element that is in an optimal reception state according to the channel to be selected by initial channel preset at the time of antenna installation, normal channel selection, channel preset by user scan operation, etc. The direction setting is stored in the storage unit 114.

  Hereinafter, an initial channel preset method in the first receiving unit 102 will be described in detail with reference to FIG.

  FIG. 2 is a flowchart for explaining the operation of executing automatic channel scanning as an initial channel preset function and acquiring the setting of the receiving antenna for each physical channel in the embodiment to which the present invention is applied. In the following, description will be made by taking the physical channel arrangement defined in the US terrestrial broadcasting as an example.

  First, in step 201, an initial channel preset is executed according to a user instruction. In step 202, the control unit 113 controls the antenna control unit 115 so that the element direction of the reception antenna 100 becomes the initial value.

  Next, in step 203, the control unit 113 sets the smallest physical channel, for example, and controls the tuner 104 to select the physical channel. In the case of US terrestrial broadcasting, the effective physical channel range is 2 to 69, so the physical channel 2 is set first.

  Next, in step 204, the control unit 113 controls the signal processing unit 106 to perform signal processing according to the broadcasting system, and proceeds to step 205 to determine the reception state. If a desired signal can be detected, the process proceeds to step 206. If a desired signal cannot be detected, the process proceeds to step 207. In the case of proceeding to step 206, the control unit 113 acquires signal quality information of the received signal from the detection unit 108.

  Next, in step 207, the control unit 113 stores the selected physical channel number, the setting of the receiving antenna, and the signal quality information in the storage unit 115. If the desired signal cannot be detected in step 205, the signal quality information is converted into the minimum value and stored in step 207.

  Next, in step 208, the control unit 113 controls the antenna control unit 115 so that the element direction of the receiving antenna 100 rotates clockwise by a predetermined angle, and proceeds to step 209.

  In step 209, the control unit determines whether or not the receiving antenna 100 has rotated 360 degrees. If the receiving antenna 100 has not reached 360 degrees, the control section returns to step 205. If it has reached 360 degrees, the control section proceeds to step 210.

  In step 210, the control unit 113 stores the setting of the receiving antenna 100 that optimizes the received signal quality from the signal quality information stored in the storage unit 114 in the storage unit 114, and proceeds to step 211.

  In step 211, the control unit 113 stores in the storage unit 114 setting information of the receiving antenna 100 when the received signal quality exceeds a predetermined threshold (reference value) from the signal quality information stored in the storage unit 114. Proceed to 212. This threshold indicates whether or not the user can receive the signal without any problem by defining a bit error rate at which the final error after error correction can be regarded as 0, for example.

  In step 212, the control unit 113 determines whether or not all physical channels defined in the US terrestrial broadcast have been selected. If not, the control unit 113 proceeds to step 213 and proceeds from step 208 to step 212. The loop is repeated until all physical channels are selected, and the automatic channel scan is completed.

  When the corresponding broadcasting systems of the first receiving unit 102 and the second receiving unit 103 are different, the same preset may be executed in the second receiving unit 103.

  An operation when the user selects a channel after performing the initial channel preset as described above will be described. When the video signal and the audio signal received by the first receiving unit 102 are output, the control unit 113 acquired in step 210 of the initial channel preset executed in the first receiving unit based on the physical channel number to be selected. The optimal setting value of the receiving antenna 100 is acquired from the storage unit 114. The set value is notified to the antenna control unit 115, and the receiving antenna 100 is controlled so as to be in the optimum direction in the physical channel to be selected.

  Next, a method for displaying received images of a plurality of channels in the broadcast receiving apparatus in the present embodiment will be described.

  FIG. 3 is a screen configuration example on the video display device 111 of the broadcast receiving device in the first embodiment. In this figure, 300 is a video display device, 301 is a first video display area, and 302 is a second video display area. For example, the video signal received by the first receiver 102 is displayed in the first display area 301, and the video signal received by the second receiver 103 is displayed in the second display area 302. Usually, the physical channel selected by the tuner 102 is different from the physical channel selected by the tuner 103. In FIG. 3, the second video display area 302 exists in the first video display area 301, but the screen configuration in the present embodiment is not limited to FIG. 3. .

  Hereinafter, a specific operation example will be described with reference to FIG. 4 for the reception antenna control when the screen configuration example as shown in FIG. 3 is realized.

  FIG. 4A is a diagram illustrating the direction of the receiving antenna 100 and whether the signal quality of the received signal exceeds a threshold value. Reference numeral 400 denotes an antenna, and as described above, the signal quality information is acquired by rotating the direction of the antenna at the time of initial antenna presetting. At this time, 401 indicates the direction of the receiving antenna 100 when the signal quality of the received signal exceeds the threshold when the physical channel M is selected in the first receiving unit 102, and 404 indicates that the signal quality exceeds the threshold under the same conditions. The direction of the receiving antenna 100 not exceeding is shown.

  Similarly, reference numeral 402 in FIG. 4B indicates the direction of the receiving antenna 100 where the signal quality of the received signal exceeds the threshold when the second receiving unit 103 selects the physical channel N, and reference numeral 405 indicates the signal quality is the threshold. The direction of the receiving antenna 100 does not exceed.

  When the physical channel M is selected in the first receiving unit 102 and the physical channel N is selected in the second receiving unit 103, if the direction of the receiving antenna 100 is selected such that the reception quality exceeds the threshold value in both receiving units. Good. That is, a direction that satisfies both criteria may be selected.

  FIG. 4 (3) shows an area 403 where the area 401 and the area 402 intersect. If the direction of the receiving antenna 100 is set to the range shown in the area 403, the first receiving unit 102 and the second receiving section 102 are shown. The receiving unit 103 can obtain a suitable reception state.

  FIG. 5 shows a channel selection method and a receiving antenna setting method in the case of realizing the screen configuration example shown in FIG. 3 in the broadcast receiving apparatus according to the present embodiment. It is assumed that the initial channel preset shown in FIG. 2 has already been executed.

  First, in step 501, the video signal transmitted on the physical channel M is displayed on the first display area 301 in FIG. 3, and at the same time, the video signal transmitted on the physical channel N is displayed on the second display in FIG. It is assumed that the user instructs the control unit 113 to display the area 302.

  Next, in step 502, the control unit 113 stores, based on the physical channel M, the setting value of the receivable receiving antenna 100 acquired in step 211 of the initial channel preset executed in the first receiving unit 114. To go to Step 503. In step 503, the control unit 113 acquires the set value of the receivable receiving antenna 100 acquired in step 211 of the initial channel preset executed in the second receiving unit from the storage unit 114 based on the physical channel N, Proceed to step 504. In step 504, the control unit 113 calculates a range where the receivable ranges acquired in step 502 and step 503 intersect, calculates an optimum value within the range, and proceeds to step 505. In step 505, the control unit 113 controls the antenna control unit 115 so that the direction of the reception antenna 100 becomes the direction calculated in step 504, and the process proceeds to step 506.

  In step 506, the control unit 113 selects the physical channel M for the first receiving unit 102, performs demodulation processing according to the broadcasting system, and supplies the video signal to the signal combining unit 110. Next, in step 507, the control unit 113 selects the physical channel N for the second reception unit 103, performs demodulation processing according to the broadcast system, and supplies the video signal to the signal synthesis unit 110.

  Next, in step 508, the control unit 113 synthesizes the video signal so that the signal processing unit 110 has the screen configuration shown in FIG. 2 and outputs the video signal to the video display unit 111. Proceed to and end.

  With the above operation, in the case of a broadcast receiving apparatus having two tuner units and two signal processing units for one receiving antenna, the reception state of the channel selected by both tuners is suitable. It becomes possible to set the direction setting of the receiving antenna.

  Even when three or more tuners and signal processing units are provided, by calculating the range where the receivable ranges of physical channels received by each tuner intersect, the reception state of each tuner is optimized. Needless to say, the direction of the antenna can be set.

Moreover, in the above-mentioned embodiment, since it has a plurality of receiving units, it is not always necessary to display the received video signal, and only the video received by the first receiving unit is displayed and the second receiving unit displays it. The received video signal / audio signal may be recorded or data may be acquired. in this case,
When the control unit 113 receives an input instruction signal input by an operation of a user or the like, the control unit 113 stores the video signal, the audio signal, or the like output from the first receiving unit or the second receiving unit in the storage unit 114. To control. As a result, the reception state of the channel selected by both tuners becomes suitable, and the video signal and the like in the suitable state can be stored, which has great merit for the user.

  Further, the video signal or the audio signal output from the first receiving unit or the second receiving unit is configured to be stored in the external storage unit 116 provided outside the receiving device via the control unit 113. Also good. The interface in this case is composed of, for example, IEEE1394 (the Institute of Electrical and Electronics Engineers 1394) or USB (Universal Serial Bus). By storing the data in the external storage unit 116, it is possible to contribute to saving the capacity of the storage unit 114 of the receiving apparatus main body, and it is convenient for the user to easily carry video data and the like.

  The video signal, audio signal, and the like are stored in the storage unit 114 in various formats such as an analog signal, a digital signal, or a TS (Transstream) format. Examples are not particularly limited. Further, for example, the signal demodulated by the signal processing unit 106 may be recorded in the storage unit 114, or the demodulated and decoded signal may be recorded in the storage unit 114. It may be configured.

  Hereinafter, the second embodiment will be described in detail. FIG. 6 is a block diagram for explaining in detail the first signal processing unit 106 in the first embodiment of the present invention shown in FIG.

  The received signal selected by the tuner 104 is supplied to the A / D converter 601. The A / D converter 601 converts the supplied signal into a digital signal and supplies it to the demodulator 602. The demodulator 602 performs demodulation processing according to the broadcasting system and supplies demodulated data to the error corrector 603.

  In the case of US terrestrial digital broadcasting, the demodulator 602 demodulates a signal modulated by an 8VSB (8-valued Vestigial Side Band) modulation method. The error correction unit 603 corrects the demodulated data with an error and then supplies it to the demultiplexer 604. The demultiplexer 604 demultiplexes the supplied data, and supplies video data to the video decoder 605 and audio data to the audio decoder 606. The video decoder 605 converts the video data into a video signal and supplies it to the signal synthesis unit 110, and the audio decoder 606 converts the audio data into an audio signal and supplies it to the signal synthesis unit 110.

  In FIG. 6, the demodulator 602 detects the SNR of the received signal and supplies it to the controller 113 as received signal quality information. Further, the error correction unit 603 can detect the bit error rate of the demodulated data and supplies it to the control unit 113 as received signal quality information. The control unit 113 determines the optimum setting of the receiving antenna 100 based on at least one of the SNR of the received signal and the bit error rate of the demodulated data.

  As a result, in the case of a broadcast receiving apparatus having a plurality of tuner units and a plurality of signal processing units for one receiving antenna, the direction of the receiving antenna is set so that the reception state of the channel selected by both tuners is suitable. Setting can be set. Note that in the receiving device in this embodiment, the second signal processing unit 106 can have the same configuration as the first signal processing unit, or the second signal corresponding to a different broadcasting system can be provided. It is also possible to have a processing unit 106.

  The present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the invention. Furthermore, the above-described embodiments include various inventions, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent features are deleted from the previous constituent features shown in the embodiment, at least one of the issues described in the column of the problem to be solved by the invention can be solved, and is described in the column of the effect of the invention. In a case where at least one of the obtained effects can be obtained, a configuration in which this configuration requirement is deleted is an invention.

It is a block diagram which shows the structural example of the broadcast receiving apparatus in embodiment to which this invention is applied. FIG. 10 is a flowchart for explaining an operation of executing an automatic channel scan and acquiring a setting of a receiving antenna for each physical channel in the embodiment to which the present invention is applied. It is the figure which showed the example of a screen structure in the video display apparatus of the broadcast receiving apparatus in embodiment to which this invention is applied. It is a figure which shows whether the direction of the receiving antenna in the embodiment to which this invention is applied, and the received signal quality in the 1st and 2nd receiving part exceed a threshold value. It is a flowchart for demonstrating the channel selection method and receiving antenna setting method in the case of implement | achieving multi-screen display in the broadcast receiver in embodiment which applied a present Example. It is a block diagram for demonstrating in detail the signal processing part in embodiment to which this invention is applied. It is a figure which shows the case where there exist two or more broadcast wave transmission stations and relay stations with respect to one reception area.

Explanation of symbols

100, 704: receiving antenna 101: distributor 102: first receiving unit 103: second receiving unit 104, 105: tuner 106, 107: signal processing unit 108, 109: detecting unit 110: signal synthesizing unit 111: video Display device 112: Audio output device 113: Control unit 114: Storage unit 115: Antenna control unit 300: Video display device 301: First video display region 302: Second video display region 401, 402, 403: Received signal Receiving antenna direction areas 404, 405, and 406 where the signal quality exceeds the threshold value: Receiving antenna direction area 601 where the signal quality of the received signal does not exceed the threshold value: A / D conversion unit 602: Demodulating unit 603: Error correcting unit 604: Demultiplexer 605: Video decoder 606: Audio decoders 701, 702, 703: Transmission station 705 Broadcast receiver

Claims (5)

  One antenna for receiving a broadcast signal having an audio signal and / or a video signal;
  A first receiver that performs channel selection, demodulation and decoding of the first channel from the broadcast signal received by the antenna, and detects signal quality information of the selected channel;
  A second receiver for selecting, demodulating and decoding a second channel different from the first channel from the broadcast signal received by the antenna and detecting signal quality information of the selected channel; ,
  Based on signal quality information detected by the first receiving unit, first setting information regarding the antenna direction range in which the signal quality exceeds a predetermined threshold, and signal quality detected by the second receiving unit A storage unit for storing, based on information, second setting information related to a direction range of the antenna in which the signal quality exceeds a predetermined threshold;
  When simultaneously outputting the demodulated and decoded signal of the first channel and the demodulated and decoded signal of the second channel, the first setting information and the second setting information from the storage unit; And a control unit that sets the antenna direction within a range where the antenna direction ranges intersect with each other. The receiving device according to claim 1,
Said first and tuning the second receive section, further comprising a synthesizing unit for synthesizing the demodulated and decoded signal, a display unit for displaying the signal synthesized by the synthesis section,
The said control unit performs a setting of the antenna direction, outputs the a first demodulated and decoded signal of the switch Yan'neru, simultaneously the display unit demodulated and decoded signal and the second switch Yan'neru receiving device which is a case. In the receiving apparatus according to claim 1 Symbol placement,
A display unit for displaying signals selected, demodulated and decoded by the first and second receiving units;
The said control unit performs a setting of the antenna direction, outputs the demodulation and decoded signal of the first channel, one of the demodulated and decoded signal of the second channel to the storage unit as well as, receiving apparatus, characterized in that the case of outputting the other on the display unit. The receiving apparatus according to any one of claims 1 to 3,
The receiving apparatus, wherein the first setting information and the second setting information are stored in the storage unit together with a corresponding channel selection channel . The receiving apparatus according to any one of claims 1 to 3 ,
A receiving apparatus, wherein the first receiving unit and the second receiving unit have different demodulation methods.

Images